The Omega Corporation has some excess cash it would like to invest in marketable securities for a long-term hold. Its Vice-President of Finance is considering three investments; (a) Treasury bonds at a 7 percent yield; ( b ) corporate bonds at a 12 percent yield; or ( c ) preferred stock at an 8 percent yield. Omega Corporation is in a 35 percent tax bracket and the tax rate on dividends is 20 percent. a-1. Compute the aftertax yields for the three investment options. Note: Do not round intermediate calculations. Input your answers as a percent rounded to 2 decimal places: a-2. Which one of the three investments should she select based on the aftertax yields? Corporate bond Treasury bonds Preferred stock